We can support running chromium on wayland natively by adding a new platform //ui/ozone/platform/wayland.
It can be done by upstreaming (with any changes requested during review) https://github.com/01org/ozone-wayland
Eventually, we can have a linux chromium that runs on either x11 or wayland based on runtime environment.
We actually already have wayland in third_party for //components/exo.